diff --git a/Geo/Makefile b/Geo/Makefile
index 248d3aa02dad6f2ab6526cb5a2ae96503a53eddc..783f0a009850048e8a71255bb461f05e1bfca02d 100644
--- a/Geo/Makefile
+++ b/Geo/Makefile
@@ -40,7 +40,8 @@ SRC = GEntity.cpp\
         MHexahedron.cpp MPrism.cpp MPyramid.cpp\
       MZone.cpp MZoneBoundary.cpp\
       CellComplex.cpp\
-      ChainComplex.cpp
+      ChainComplex.cpp\
+      STensor3.cpp
 
 
 OBJ = ${SRC:.cpp=${OBJEXT}}